staging: comedi: allow pcmcia drivers to auto attach

Introduce some helper functions to allow converting the comedi
pcmcia drivers to the comedi auto_attach mechanism.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2 files changed, 42 insertions, 0 deletions

diff --git a/drivers/staging/comedi/comedi_pcmcia.c b/drivers/staging/comedi/comedi_pcmcia.c
index 85229456bf28..f10bcc529585 100644
--- a/drivers/staging/comedi/comedi_pcmcia.c
+++ b/drivers/staging/comedi/comedi_pcmcia.c
@@ -28,6 +28,42 @@
 #include "comedidev.h"
 
 /**
+ * comedi_to_pcmcia_dev() - comedi_device pointer to pcmcia_device pointer.
+ * @dev: comedi_device struct
+ */
+struct pcmcia_device *comedi_to_pcmcia_dev(struct comedi_device *dev)
+{
+        return dev->hw_dev ? to_pcmcia_dev(dev->hw_dev) : NULL;
+}
+EXPORT_SYMBOL_GPL(comedi_to_pcmcia_dev);
+
+/**
+ * comedi_pcmcia_auto_config() - Configure/probe a comedi PCMCIA driver.
+ * @link: pcmcia_device struct
+ * @driver: comedi_driver struct
+ *
+ * Typically called from the pcmcia_driver (*probe) function.
+ */
+int comedi_pcmcia_auto_config(struct pcmcia_device *link,
+                              struct comedi_driver *driver)
+{
+        return comedi_auto_config(&link->dev, driver, 0);
+}
+EXPORT_SYMBOL_GPL(comedi_pcmcia_auto_config);
+
+/**
+ * comedi_pcmcia_auto_unconfig() - Unconfigure/remove a comedi PCMCIA driver.
+ * @link: pcmcia_device struct
+ *
+ * Typically called from the pcmcia_driver (*remove) function.
+ */
+void comedi_pcmcia_auto_unconfig(struct pcmcia_device *link)
+{
+        comedi_auto_unconfig(&link->dev);
+}
+EXPORT_SYMBOL_GPL(comedi_pcmcia_auto_unconfig);
+
+/**
  * comedi_pcmcia_driver_register() - Register a comedi PCMCIA driver.
  * @comedi_driver: comedi_driver struct
  * @pcmcia_driver: pcmcia_driver struct
diff --git a/drivers/staging/comedi/comedidev.h b/drivers/staging/comedi/comedidev.h
index 329b1d7bc45e..ea585ebd07df 100644
--- a/drivers/staging/comedi/comedidev.h
+++ b/drivers/staging/comedi/comedidev.h
@@ -465,6 +465,12 @@ static inline void comedi_pci_disable(struct pci_dev *dev)
 /* comedi_pcmcia.c - comedi PCMCIA driver specific functions */
 
 struct pcmcia_driver;
+struct pcmcia_device;
+
+struct pcmcia_device *comedi_to_pcmcia_dev(struct comedi_device *);
+
+int comedi_pcmcia_auto_config(struct pcmcia_device *, struct comedi_driver *);
+void comedi_pcmcia_auto_unconfig(struct pcmcia_device *);
 
 int comedi_pcmcia_driver_register(struct comedi_driver *,
                                         struct pcmcia_driver *);